EP1460357B1 - Wire-and-tube condenser for refrigeration appliances - Google Patents

Wire-and-tube condenser for refrigeration appliances Download PDF

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Publication number
EP1460357B1
EP1460357B1 EP04002532A EP04002532A EP1460357B1 EP 1460357 B1 EP1460357 B1 EP 1460357B1 EP 04002532 A EP04002532 A EP 04002532A EP 04002532 A EP04002532 A EP 04002532A EP 1460357 B1 EP1460357 B1 EP 1460357B1
Authority
EP
European Patent Office
Prior art keywords
coil
wire
rectilinear
condenser
wires
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04002532A
Other languages
German (de)
French (fr)
Other versions
EP1460357A3 (en
EP1460357A2 (en
Inventor
Marino Giro
Walter Cauz
Pier Vito Caporusso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IMAT SpA
Original Assignee
IMAT SpA
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Publication date
Application filed by IMAT SpA filed Critical IMAT SpA
Priority to PL04002532T priority Critical patent/PL1460357T3/en
Publication of EP1460357A2 publication Critical patent/EP1460357A2/en
Publication of EP1460357A3 publication Critical patent/EP1460357A3/en
Application granted granted Critical
Publication of EP1460357B1 publication Critical patent/EP1460357B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/122—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of wires
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/047—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag
    • F28D1/0477—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being bent, e.g. in a serpentine or zig-zag the conduits being bent in a serpentine or zig-zag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/13—Vibrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0068—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for refrigerant cycles
    • F28D2021/007—Condensers

Definitions

  • the present invention refers to a wire-and-tube condenser for refrigeration appliances and, in particular, the method used for securing the tube carrying the refrigerant medium.
  • a condenser of the kind indicated above is essentially formed by a metal tubular conduit coiled into loops, which develops according to a planar surface to define a plurality of rectilinear tubular sections extending parallel to each other. These rectilinear tubular sections are fluidly connected to each other via curved portions, or bend sections, and are joined with each other by means of a plurality of rigid metal wires that are welded on to said rectilinear tubular sections in an orthogonal direction thereto. These metal wires are arranged on both sides of the tubular coil formed by said loops and the wires situated on one side thereof may be offset from those on the other side, such as this is for instance described in US 2,667,762.
  • the condenser must then be secured to the back wall of the refrigeration appliance by means of appropriate brackets.
  • the refrigerant medium is caused to circulate inside, i.e. flow through the tubular coil of the condenser whenever the compressor of the refrigerating circuit of the appliance is switched on.
  • the compressor being switched on and off therefore, generates corresponding variations in the pressure of the refrigerant medium, and these variations in turn cause dynamical stresses to be imposed on the condenser, in particular in the initial portion thereof connected to the delivery side of the compressor.
  • the condenser may be subject to undesirable vibrations giving rise to noise generation.
  • a first solution provides for the delivery tube to be given the required rigidity through the use of plates to be welded to the grid formed by the condenser wires.
  • some wires may be welded thereto to connect the delivery tube to the bend or curved portions of the tubular coil.
  • a wire-and-tube condenser for refrigeration appliances essentially comprises a tubular coil 10 that defines a plurality of rectilinear tubular sections 12 extending parallel to each other, which are fluidly connected to each other via curved or bend sections 14 and are joined together by means of a plurality of rigid metal wires 16 that are welded on both sides of said rectilinear tubular sections in an orthogonal direction thereto.
  • the rectilinear tubular sections 12 usually have the same length and are arranged according to a planar configuration, although condensers may equally be found, the tubular coils of which show a corrugated, wavy or zigzaggy development pattern (as illustrated for instance in US 6,389,695).
  • the wires 16 form two web-like surfaces on the two sides of the coil 10, respectively, and the wires of a web-like surface may be aligned with or offset from the wires forming the other web.
  • the coil 10 starts with, i.e. is preceded by a rectilinear tubular section 17, the inlet end portion 18 of which is connected with the delivery side of the compressor of the refrigerating circuit (not shown).
  • the outlet end portion 20 of the coil is on the contrary connected with the remainder of th refrigerating circuit of the refrigeration appliance.
  • the condenser itself is attached to the rear wall of the refrigeration appliance (not shown) by means of plates 22, which are usually screwed on the rear corner uprights of the outer casing of the appliance.
  • At least a portion of the tubular coil 10 features an additional curved section 24, which is inserted and secured by press-fitting between the wires 16 welded to the rectilinear tubular sections 12.
  • the curved section 24 is provided in the initial portion of the delivery tube 17, close to the extremity 18 that connects to the delivery side of the compressor, i.e. where the pressure of the refrigerant medium is felt more sensibly when the compressor is switched on and, anyway, operated.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Other Air-Conditioning Systems (AREA)
  • Compressor (AREA)

Abstract

Wire-and-tube condenser, which is exposed to vibrations coming from the compressor, comprises a tubular coil (10) defining a plurality of rectilinear tubular sections (12) that extend parallel to each other, are fluidly joined to each other by curved portions (14) and are connected to each other by means of a plurality of rigid metal wires (16), which are welded in an orthogonal direction to both sides of said rectilinear tubular sections. <??>At least a portion of the tube coil (10) is provided with a further curved section (24), which is inserted, and held securely in place by press-fitting, between the wires (16) welded to the rectilinear tubular sections (12). <IMAGE>

Description

  • The present invention refers to a wire-and-tube condenser for refrigeration appliances and, in particular, the method used for securing the tube carrying the refrigerant medium.
  • A condenser of the kind indicated above is essentially formed by a metal tubular conduit coiled into loops, which develops according to a planar surface to define a plurality of rectilinear tubular sections extending parallel to each other. These rectilinear tubular sections are fluidly connected to each other via curved portions, or bend sections, and are joined with each other by means of a plurality of rigid metal wires that are welded on to said rectilinear tubular sections in an orthogonal direction thereto. These metal wires are arranged on both sides of the tubular coil formed by said loops and the wires situated on one side thereof may be offset from those on the other side, such as this is for instance described in US 2,667,762.
  • The condenser must then be secured to the back wall of the refrigeration appliance by means of appropriate brackets.
  • The refrigerant medium is caused to circulate inside, i.e. flow through the tubular coil of the condenser whenever the compressor of the refrigerating circuit of the appliance is switched on. The compressor being switched on and off, therefore, generates corresponding variations in the pressure of the refrigerant medium, and these variations in turn cause dynamical stresses to be imposed on the condenser, in particular in the initial portion thereof connected to the delivery side of the compressor. As a result, the condenser may be subject to undesirable vibrations giving rise to noise generation.
  • In view of solving this problem and giving the condenser the necessary rigidity, there have been proposed, and are currently used, many solutions and methods, actually. For instance, a first solution provides for the delivery tube to be given the required rigidity through the use of plates to be welded to the grid formed by the condenser wires. Alternatively, some wires may be welded thereto to connect the delivery tube to the bend or curved portions of the tubular coil. These solutions, however, have a major drawback in that they usually complicate the manufacturing process of the condenser and may give rise to leakages in the circuit of the refrigerant medium.
  • The possibility is further given for appropriate pipe or tube clamps of metal or plastic material to be used to the above-cited purpose. Even in this case, however, the application of additional mechanical parts contributes to complicate the construction of the condenser and the related manufacturing process. Furthermore, in the case that plastic clamps are used, the need arises for special materials to be selected to this purpose, i.e. materials that are resistant to high temperatures and are not subject to aging and downgrading over time.
  • It therefore is the object of the present invention to provide a wire-and-tube condenser for refrigeration appliances providing a more rational and reliable approach to securing the refrigerant-medium delivery tube.
  • Within this general object, it is further a purpose of the present invention to provide a wire-and-tube condenser of the above-indicated kind, which is capable of being obtained, i.e. produced through the use of both simple and low-cost means that do not require or imply any substantial modification to the existing manufacturing lines.
  • Features and advantages of the present invention will anyway be more readily understood from the description that is given below by way of nonlimiting example with reference to the accompanying drawings, in which:
    • Figure 1 is a schematical plan view of a wire-and-tube condenser according to the present invention;
    • Figure 2 is a partial perspective view of a detail of the condenser shown in Figure 1;
    • Figure 3 is a partially cross-sectional and enlarged side view of a peculiar detail of the condenser shown in Figure 1;
    • Figure 4 is a schematical plan view of a modified embodiment of the condenser shown in Figure 1.
  • A wire-and-tube condenser for refrigeration appliances according to the present invention essentially comprises a tubular coil 10 that defines a plurality of rectilinear tubular sections 12 extending parallel to each other, which are fluidly connected to each other via curved or bend sections 14 and are joined together by means of a plurality of rigid metal wires 16 that are welded on both sides of said rectilinear tubular sections in an orthogonal direction thereto.
  • The rectilinear tubular sections 12 usually have the same length and are arranged according to a planar configuration, although condensers may equally be found, the tubular coils of which show a corrugated, wavy or zigzaggy development pattern (as illustrated for instance in US 6,389,695).
  • The wires 16 form two web-like surfaces on the two sides of the coil 10, respectively, and the wires of a web-like surface may be aligned with or offset from the wires forming the other web.
  • The coil 10 starts with, i.e. is preceded by a rectilinear tubular section 17, the inlet end portion 18 of which is connected with the delivery side of the compressor of the refrigerating circuit (not shown). The outlet end portion 20 of the coil is on the contrary connected with the remainder of th refrigerating circuit of the refrigeration appliance.
  • The condenser itself is attached to the rear wall of the refrigeration appliance (not shown) by means of plates 22, which are usually screwed on the rear corner uprights of the outer casing of the appliance.
  • According to the present invention, at least a portion of the tubular coil 10 features an additional curved section 24, which is inserted and secured by press-fitting between the wires 16 welded to the rectilinear tubular sections 12.
  • It has in fact been found experimentally that the wires 16, when they are welded on to the rectilinear tubular sections 12, tend to somehow warp, although preserving their rigidity. Such distortion results in a reduction in the distance between the wires of a web and the wires of the other web, in the free portion between two adjacent rectilinear tubular sections 12 (Figure 3). As a result, inserting the curved section 24 between the two webs of wire gives rise to a kind of restrained joint that makes it possible for the structure of the coil 10 to be strengthened in its rigidity. A more rigid structure enables in turn to sensibly reduce the vibrations that are brought about in the condenser whenever the compressor is switched on and off, and that are transmitted to the outer casing of the refrigeration appliance.
  • In particular, the curved section 24 is provided in the initial portion of the delivery tube 17, close to the extremity 18 that connects to the delivery side of the compressor, i.e. where the pressure of the refrigerant medium is felt more sensibly when the compressor is switched on and, anyway, operated.
  • As an alternative solution to the embodiment described above, the possibility is given for a similar curved section 24 to be provided (Figure 4), which, instead of being press-fitted in between the wires 16 (as shown in Figure 1), is so shaped as to be able to be welded therebetween. To this purpose, in correspondence of said curved section 24, the coil 10 must be provided with a section 26 that is shorter than the other sections forming the same coil.

Claims (4)

  1. Wire-and-tube condenser for refrigeration appliances, such as those intended in particular for household applications, comprising a tubular coil (10) that defines a plurality of rectilinear tubular sections (12) extending parallel to each other, which are fluidly connected to each other via curved portions (14) and are joined with each other by means of a plurality of rigid metal wires (16), which are welded in an orthogonal direction to both sides of said rectilinear tubular sections, characterized in that at least a portion of the tubular coil (10) is provided with a further curved section (24), which is inserted, and held securely in place by press-fitting, between the wires (16) welded to the rectilinear tubular sections (12).
  2. Wire-and-tube condenser for refrigeration appliances according to claim 1, in which the coil (10) is preceded by a rectilinear tubular section (17), characterized in that said further curved section (24) of the tubular coil (10) is provided in said rectilinear section (17), close to the end portion (18) thereof, through which the refrigerating medium flows into the condenser.
  3. Wire-and-tube condenser for refrigeration appliances according to any of the preceding claims, characterized in that said further curved section (24) is so shaped as to be able to be welded on between the wires (16) joining the rectilinear tubular sections (12) with each other.
  4. Wire-and-tube condenser for refrigeration appliances according to any of the preceding claims, characterized in that, in correspondence of said curved section (24), the coil (10) is provided with a section (26) that is shorter than the other sections forming the same coil.
EP04002532A 2003-03-17 2004-03-01 Wire-and-tube condenser for refrigeration appliances Expired - Lifetime EP1460357B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04002532T PL1460357T3 (en) 2003-03-17 2004-03-01 Wire-and-tube condenser for refrigeration appliances

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN20030022 2003-03-17
IT000022A ITPN20030022A1 (en) 2003-03-17 2003-03-17 WIRED CONDENSER FOR REFRIGERATOR APPLIANCES.

Publications (3)

Publication Number Publication Date
EP1460357A2 EP1460357A2 (en) 2004-09-22
EP1460357A3 EP1460357A3 (en) 2004-10-06
EP1460357B1 true EP1460357B1 (en) 2006-05-24

Family

ID=32800732

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04002532A Expired - Lifetime EP1460357B1 (en) 2003-03-17 2004-03-01 Wire-and-tube condenser for refrigeration appliances

Country Status (5)

Country Link
EP (1) EP1460357B1 (en)
AT (1) ATE327484T1 (en)
DE (1) DE602004000934D1 (en)
IT (1) ITPN20030022A1 (en)
PL (1) PL1460357T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079762A1 (en) 2011-07-25 2013-01-31 BSH Bosch und Siemens Hausgeräte GmbH HEAT EXCHANGER FOR A REFRIGERATOR, METHOD FOR MANUFACTURING A HEAT EXCHANGER AND REFRIGERATOR

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006013713U1 (en) * 2006-09-07 2006-11-02 BSH Bosch und Siemens Hausgeräte GmbH A method for providing refrigerator shelving has the system evaporator tubing formed in a flat panel with closely adjacent bends at each side with no additional components
DE102007023696B4 (en) * 2007-05-22 2011-06-22 Institut für Luft- und Kältetechnik gGmbH, 01309 Condenser for household refrigerators
DE102007023672A1 (en) * 2007-05-22 2008-11-27 Institut für Luft- und Kältetechnik gGmbH Compact condenser for e.g. house-hold refrigerator, has band-like extruded section pipe having breadth that is double thickness of pipe, and two channels that are separated from each other and run parallel to each other
DE102008041556A1 (en) * 2008-08-26 2010-03-04 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration unit with heat exchanger
DE102009000668A1 (en) 2009-02-06 2010-08-12 BSH Bosch und Siemens Hausgeräte GmbH Heat exchanger, in particular condenser or evaporator for a household refrigerator
CN103017421B (en) * 2012-12-27 2015-08-26 合肥美的电冰箱有限公司 Wire-tube evaporator and the refrigerator with this wire-tube evaporator
CN103673407A (en) * 2013-12-11 2014-03-26 常州市常蒸蒸发器有限公司 Evaporator

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB270148A (en) * 1926-09-09 1927-05-05 Richard Godfrey Crittall Improvements in connection with the bending of pipes or tubes into zig-zag or serpentine formation
US2667762A (en) 1951-04-26 1954-02-02 Borg Warner Condenser for refrigerating systems
GB886234A (en) * 1957-08-15 1962-01-03 English Electric Co Ltd Improvements in and relating to tube condensers for refrigerators
DE1551294A1 (en) * 1967-01-19 1970-03-05 Danfoss As Pressure pipe for encapsulated refrigeration machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011079762A1 (en) 2011-07-25 2013-01-31 BSH Bosch und Siemens Hausgeräte GmbH HEAT EXCHANGER FOR A REFRIGERATOR, METHOD FOR MANUFACTURING A HEAT EXCHANGER AND REFRIGERATOR
WO2013013997A1 (en) 2011-07-25 2013-01-31 BSH Bosch und Siemens Hausgeräte GmbH Heat exchanger for a refrigeration device, method for manufacturing a heat exchanger, and refrigeration device

Also Published As

Publication number Publication date
ATE327484T1 (en) 2006-06-15
PL1460357T3 (en) 2006-09-29
EP1460357A3 (en) 2004-10-06
EP1460357A2 (en) 2004-09-22
DE602004000934D1 (en) 2006-06-29
ITPN20030022A1 (en) 2004-09-18

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